focusing mirror

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• Mirror cut-off — is a term used in photography for a problem that can occur within a reflex camera. This occurs when the mirror in the camera is smaller than the focusing screen and using long (telephoto) lenses. When light exits a non telephoto lens, the light… …   Wikipedia

• Mirror — looking glass redirects here. For other uses, see Looking Glass (disambiguation). This article is about wave reflectors (mainly, specular reflection of visible light). For other uses, see Mirror (disambiguation). A mirror, reflecting a vase A… …   Wikipedia

• Atomic mirror — In physics, an atomic mirror is a device which reflects neutral atoms in the similar way as the conventional mirror reflects visible light.Atomic mirrors can be made of electric fields or magnetic fields,cite journal… …   Wikipedia

• Ridged mirror — In atomic physics, a ridged mirror (or ridged atomic mirror, or Fresnel diffraction mirror) is a kind of atomic mirror, designed for the specular reflection of neutral particles (atoms) coming at the grazing incidence angle, characterised in the… …   Wikipedia

• Secondary mirror — A secondary mirror (or secondary) is a second light gathering and focusing surface in a reflector telescope. Light gathered by the primary mirror is directed towards a focal point typically past the location of the secondary. The secondary… …   Wikipedia

• A Distant Mirror — A Distant Mirror: The Calamitous 14th Century , published in 1978, is a work by American historian Barbara Tuchman, focusing on life in 14th century Europe. To provide a central figure in her sweeping narrative, Tuchman chose the French nobleman… …   Wikipedia

• The Augustinian Mirror — is the official student magazine of the University of San Agustin in Iloilo City, Philippines. It was also adopted as the official name of the student publication of the elementary department of Colegio San Agustin Makati (founded 1969), a sister …   Wikipedia

• parabolic mirror — noun a parabolic reflector for light radiation • Hypernyms: ↑parabolic reflector, ↑paraboloid reflector • Part Holonyms: ↑reflecting telescope, ↑reflector * * * noun see parabolic reflector 1 * * …   Useful english dictionary

• Pfund telescope — The Pfund telescope, originated by A. H. Pfund, provides another method for achieving a fixed telescope focal point in space regardless of where the telescope line of sight is pointed. This configuration utilizes a two axis feed flat mirror to… …   Wikipedia

• Rotating furnace — A rotating furnace is a device used to create lenses or primary mirrors for optical telescopes. It was observed that the centrifugal force induced shape of a spinning liquid is approximately the same as the shape of a telescope s primary focusing …   Wikipedia

• Gopalasamudram Narayana Iyer Ramachandran — (8 October, 1922 7 April, 2001) is widely acknowledged as one of the most important Indian scientists of the 20th century, best known for his work that led to his creation of the Ramachandran plot for understanding peptide structure. He also made …   Wikipedia